Reliability and Validity of the Korean Version of the Psychotic Symptom Rating Scale

Objective: Psychotic Symptom Rating Scale(PSYRATS) is an assessment tool to measure the severity of different dimensions of auditory hallucinations and delusions. The reliability and validity of the Korean version of PSYRATS(K-PSYRATS) were examined in Korean patients with major psychosis Method: The inter-rater reliability of the K-PSYRATS was determined from the videotaped interviews of the five schizophrenic patients. To measure validity and internal consistency reliability, the 109 patients with auditory hallucinations or delusions were assessed using the K-PSYRATS, Positive and Negative Syndrome Scale(PANSS) and Clinical Global Impression-Severity(CGI-S) scale Result: K-PSYRATS was found to have excellent inter-rater reliability (intra-class correlation coefficient of auditory hallucination=0.81, p〈.001, intra-class correlation coefficient of delusion=0.97, p〈.001) and internal consistency reliability(Cronbach's α of auditory hallucination=0.77, Cronbach's α of delusion=0.76). Significant correlation was found between K-PSYRATS and positive syndrome subscale of PANSS and CGI. Conclusion: K-PSYRATS is a useful assessment instrument for psychotic symptoms in Korea.